|Publication number||US4883320 A|
|Application number||US 07/218,265|
|Publication date||28 Nov 1989|
|Filing date||13 Jul 1988|
|Priority date||15 Jul 1987|
|Publication number||07218265, 218265, US 4883320 A, US 4883320A, US-A-4883320, US4883320 A, US4883320A|
|Inventors||Satoshi Izumida, Katsumi Kitamura|
|Original Assignee||Ikeda Bussan Co., Ltd.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (11), Referenced by (98), Classifications (13), Legal Events (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The present invention relates to a structure of seats, particularly of vehicle seats.
Seats, particularly vehicle seats are designed from the viewpoint of human-factors engineering to keep persons as less fatigued as possible even when they are seated on the seats for a long time. In addition, the vehicle seats must be intended to improve their productivity, weight and cost as well as their comfortableness which persons feel when they are seated on them.
In the case of the conventional vehicle seat shown in FIG. 1, sheet-like springs 1 are used instead of usual S-like springs and they are attached to seat frames 3 by means of hooks 2. In this seat structure, a pad 4 is then located above the sheet-like spring 1, which is covered by a surface skin 6 with a wadding 5 interposed, as shown in FIG. 2. In the seat structure in which the usual S-like springs are used, the pad 4 must be made so thick as not to make persons feel the stiffness of the S-like springs, but when the sheet-like springs 1 are used, the pad 4 can be made thin. The thickness of the seat itself can be thus made thin, thereby reducing its weight, lowering its cost and making the space in the car room so wider as to make a better use of it.
In this seat structure in which the sheet-like springs 1 are used, however, the whole of the sheet-like spring 1 is flexibly extended by the hip of a person 7, as shown in FIG. 3, when he sits on the seat. This makes him feel that he is sunk into the seat. In addition, the sheet-like spring 1 is pressed against his hip to disturb the circulation of blood there, thereby making him more fatigued. Further, when the upper half of his body swings left and right, as shown in FIG. 4, the whole of the sheet-like spring 1 is flexibly extended, following his swinging body, thereby making him feel that he is not stably held on the seat.
A seat structure according to the present invention includes support panels for supporting those portions of a person's body which are strongly pressed by the seat when he sits on it, and sheet-like springs stretched between seat frames to fix the support panels.
Those portions of his body which are more strongly pressed by the seat when he sits on it, that is, his ischium torus, lumbar and scapular portions, are supported by the support panels, which are further supported by the sheet-like springs. This prevents his body from being locally pressed by the seat and also prevents him from feeling that he is sunk into the seat when he sits on it, thereby enabling him to feel that he is securely held on it.
The vehicle seats on which persons may be seated for a long time are designed so that the distribution of pressure which is added to their bodies by the seats, i.e., the distribution of body-pressing pressure is correct and comfortable. However, they are different from one another in their physical outline and the distribution of pressure which is preferable to one may not be comfortable to others. It is therefore advantageous to provide various degrees of the body-pressing pressure distribution without changing the seat structure much. According to the present invention, various degrees of the body-pressing pressure distribution can be provided by changing the support panels fixed on the sheet-like springs but using the same seat frames.
An object of the present invention is therefore to provide an improved seat structure in which the sheet-like springs are used.
Another object of the invention is to provide a seat structure capable of preventing persons from feeling as if they were sunk into seats when they are seated on them.
A further object of the present invention is to provide a seat structure capable of making persons feel that they are securely held on seats when they are seated on them.
These and other objects as well as merits of the present invention will become apparent from the following detailed description with reference to the accompanying drawings.
FIG. 1 is a perspective view showing an example of the vehicle seat provided with the conventional seat structure.
FIG. 2 is a sectional view taken along a line X--X in FIG. 1.
FIGS. 3 and 4 are intended to explain how the vehicle seat shown in FIG. 1 acts when a person is seated on it.
FIG. 5 is a perspective view showing an example of the vehicle seat provided with a seat structure of the present invention.
FIG. 6 is a sectional view taken along a line VI--VI in FIG. 5.
FIGS. 7, 8 and 9 are perspective views showing other seat structures of the present invention.
FIG. 10 is a perspective view showing an example of the vehicle seat provided with a further seat structure of the present invention.
FIG. 11 is a sectional view taken along a line XI--XI in FIG. 10.
FIG. 12 is a perspective view showing a still further example of the seat structure according to the present invention.
The seat shown in FIG. 5 is divided into a seat cushion 11 and a seat back 12. The seat cushion 11 includes a rectangular cushion frame 13 therein and a sheet-like spring 15 having a support panel 14 made of resin and intended to receive the ischium torus portion of a human body is spread in the cushion frame 13. The support panel 14 made of resin and having a certain elasticity lower than that of the sheet-like spring 15 is designed to have such a shape and a position as to enable an excellent distribution of the body-pressing pressure to be gained on the human body at the ischium torus portion thereof. The support panel 14 is located on the surface of the sheet-like spring 15 and made integral to the latter. The sheet-like spring 15 is made of cloth comprising woofs of resin fibers having high elasticity and warps of resin fibers having low elasticity. A strap-like resin hook 16 is made integral to each of four sides of the rectangular sheet-like spring 15 and these strap-like hooks 16 are suspended from wires 17 each welded to the inner rim of the cushion frame 13 to keep the sheet-like spring 15 stretched in the cushion frame 13. A pad 18 is mounted on this frame assembly, which is further covered by a surface skin 20 with a wadding 19 interposed, as shown in FIG. 6. The outer rim of the surface skin 20 is fixed to the cushion frame 13 by means of hog rings (not shown).
The seat back 12 has the substantially same structure as the above-described one of the seat cushion 11. A sheet-like spring 23 having a support panel 22 made of resin and intended to receive the shoulder blade and lumbar portions of human body is spread in a rectangular back frame 21 in such a way that resin hooks 24 which are made integral to three sides but not to a lower one of the sheet-like spring 23, are suspended from wires 25 each welded to the inner rim of the back frame 21. The sheet-like springs 15 and 23 may be fixed to the frames 13 and 21 to hold their support panels 14 and 22 on their back sides.
When a person sits on the seat which has the above-described structure, his weight is efficiently supported by the resin-made support panels 14 and 22 which are suspended from the seat frames 13 and 21 by means of the sheet-like springs 15 and 23. Further, thanks to the right cushion effect which is doubled by the elasticities of the resin-made support panels 14, 22 and those of the sheet-like springs 15, 23, he does not feel any pressure added uncomfortably and locally to his body, nor does he feel as if he were sunk into the seat. Rather, he feels that he is securely held on the seat. Therefore, he can be made less fatigued and support himself more naturally on the seat.
This seat structure may be changed as shown in FIG. 7, wherein resin-made support panels 141 and 221, different in shape from those as described above, are used without changing the size and structure of the seat itself to obtain a distribution of the body-pressing pressure most suitable for a particular person who sits on this seat. As shown in FIG. 8, a resin-made support panel 143 shaped like a flat triangular pyramid may be used, as a stopper, to locate between the thighs of the seated person, in addition to a resin-made support panel 142 which is intended to support his ischium torus portion. Further, a rectangular resin-made support panel 223 intended to support his lumbar portion may be made integral to a resin-made support panel 222 intended to support his shoulder blade portion, said support panel 223 being thicker than the support panel 222. When the resin-made support panels are changed of their shape, the sheet-like springs 15 and 23 become different in their areas spread outside these support panels and their spring characteristics are changed accordingly. Taking this into consideration, the resin-made support panels may be shaped to provide an optimum distribution of the body-pressing pressure. Alternatively, an optimum distribution of the body-pressing pressure may be provided by weaving fibers of higher elasticity into those portions of the sheet-like springs 15 and 23 which are adjacent to the resin-made support panels 14 and 22, that is, into both side portions 15a and 15b of a support panel 144 intended to support ischium torus portion of the seated person, and into an upper portion 23a, upper side portions 23b, 23c and lower side portions 23d, 23e of a support panel 224 intended to support his lumbar and shoulder blade portions, as shown in FIG. 9.
FIG. 10 shows another example of the seat structure according to the present invention. This seat structure is applied to the seat of the bucket type, which is divided into a seat cushion 26 and a seat back 27. The seat cushion 26 includes a rectangular cushion frame 28 and side support frames 29 which are welded to both sides of the cushion frame 28. A resin-made support panel 30 intended to support the ischium torus portion of human body is made integral to a sheet-like spring 31, which is plain-woven with resin fibers, substantially in the center thereof. The sheet-like spring 31 is provided with extended portions 31a on both sides thereof and a resin-made reinforcing panel 32 which is slightly curved upward is molded integral between the extended portion 31a and the sheet-like spring 31. Further, a strap-like resin-made rim piece 33 is molded integral to the outer side rim of each of the extended portions 31a. Reinforcing sub-panels 32a each extended from a part of that side of the sheet-like spring 31 from which the extended portions 31a is also spread are hooked to the cushion frame 28 through suspended wires 35 by means of hooks 36, and the rim pieces 33 are hooked to the side support frames 29 by hooks 37, respectively, as shown in FIG. 11. A pad 38 is mounted on this frame assembly, which is further covered by a surface skin 40 with a wadding 39 interposed. The outer rim of the surface skin 40 is fixed to the cushion frame 28 by means of hog rings (not shown).
The seat back 27 shown in FIG. 10 has the substantially same structure as that of the seat cushion 26. Side support frames 42 are welded to both sides of rectangular back frame 41, respectively. A resin-made support panel 43 which is intended to support the lumbar and shoulder blade portions of the seated person is molded integral to a sheet-like spring 44, same in material as the one 31, substantially in the center thereof. The sheet-like spring 44 is provided with extended portions 44a on both sides thereof and a resin-made reinforcing panel 45 which is slightly curved upward is molded integral to the border between the extended portion 44a and the spring 44. Further, a strap-like rim piece 46 is molded integral to the outer rim of each of the extended portions 44a. Reinforcing sub-panels 45a each extended from a part of that side of the sheet-like spring 44 from which the extended portion 44a is also spread are hooked to the back frame 41 by means of hooks 47. The reinforcing panels 45 are hooked to the back frame 41 through suspended wires 48 by means of hooks 49 and the rim pieces 46 are also hooked to the side support frames 42 by hooks 50. A pad is mounted on this frame assembly, which is further covered by a surface skin with a wadding interposed. The outer rim of the surface skin is fixed to the back frame 41.
According to this seat structure, the reinforcing panels 32, 45 and sub-panels 32a, 45a serve to hold the sheet-like springs 31, 44 and their extended portions 31a, 44a as they are shaped and to support the seated person from his both sides. This cooperates with the action of the support panels 30 and 43 to make him feel that he is securely held in the seat.
This seat structure can also be applied to the seat of the bucket type in which the seat cushion and back are formed as a unit, when a resin-made support panel 301 which is intended to support the ischium torus portion of the seated person and a resin-made support panel 431 which is intended to support his lumbar and shoulder blade portions are molded, as a unit, integral onto a continuous sheet of springs 311 and 441, as shown in FIG. 12. This example is different from the one shown in FIG. 10 in the shape of the panels but fundamentally same in structure. The sheet-like spring portions 311 and 441 which are located at the seat cushion and back are provided with extended portions 311a and 441a. Resin-made reinforcing panels 321 and 451 provided with extensions 321a and 451a are molded integral to borders between the extended portion 311a and the sheet-like spring portion 311 and between the extended portion 441a and the sheet-like spring portion 441, respectively. Further, resin-made rim pieces 331 and 461 are molded integral to outer side rims of the extended portions 311a and 441a, respectively, and they are hooked to the cushion and back frames and the side support frames, respectively. These frame assemblies are covered by pads, waddings and surface skins to form a seat.
Although the support panels have been made of resin in the above-described examples, soft rubber, wood and metal may be used in the form of plates. The sheet-like spring may be woven by fibers made of other material, or plates of soft rubber or elastic resin may be used as the sheet-like spring.
Although the present invention has been described citing its preferred embodiments, it should be understood that various changes and modifications can be made without departing from the spirit and scope of the present invention.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3471824 *||16 Apr 1965||7 Oct 1969||Bosch Gmbh Robert||Plug and socket connection|
|US3495871 *||3 Nov 1967||17 Feb 1970||Recaro Ag||Adjustable seat,primarily for motor vehicles|
|US3503649 *||1 Apr 1968||31 Mar 1970||Johnson Merle E||Contoured support cushion|
|US4077669 *||19 Jan 1977||7 Mar 1978||Louis Fox||Self-centering posture seat|
|US4522447 *||17 Sep 1981||11 Jun 1985||Snyder William F||Foam seat and back cushions|
|US4582361 *||30 Nov 1983||15 Apr 1986||Kennel Stephen W||Lightweight seat frame for vehicles|
|US4583783 *||28 Mar 1984||22 Apr 1986||Tachikawa Spring Co., Ltd.||Seat support for a vehicle seat|
|US4607887 *||24 Feb 1984||26 Aug 1986||Hoover Universal, Inc.||Encapsulated bolster|
|US4637651 *||7 Aug 1984||20 Jan 1987||Saab-Scania Aktiebolag||Seat plate|
|US4761035 *||13 Jul 1987||2 Aug 1988||Tachikawa Spring Co., Ltd.||Seat cushion assembly|
|EP0046892A1 *||4 Aug 1981||10 Mar 1982||Nissan Motor Co., Ltd.||A lightweight seat having a lumbar supporter|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US5040848 *||15 May 1990||20 Aug 1991||Ikeda Bussan Company Ltd.||Seatback frame|
|US5092654 *||13 Mar 1990||3 Mar 1992||Aisin Seiki Kabushiki Kaisha||Seatback spring device|
|US5101811 *||13 Dec 1990||7 Apr 1992||Sumner Brunswick||Fitted seating apparatus and manufacture|
|US5129707 *||17 Jun 1991||14 Jul 1992||Ikeda Bussan Company Ltd.||Seatback frame having retrorse connection of a concave resilient lumbar support member|
|US5219205 *||21 Nov 1991||15 Jun 1993||Cesa-Compagnie Europenne De Sieges Pour Automobiles||Enveloping covering for a seat, and its application to vehicle seats|
|US5368368 *||6 May 1992||29 Nov 1994||Toyoda Jidosha Kabushiki Kaisha||Vehicle seat and method of production thereof|
|US5375908 *||8 Mar 1993||27 Dec 1994||Goor Associates, Inc.||Integral inflatable occupant restraint system|
|US5441331 *||25 Jun 1992||15 Aug 1995||Concept Seating, Inc.||Seating assembly|
|US5681091 *||15 Jun 1995||28 Oct 1997||Aircraft Modular Products, Inc.||Aircraft seat pan assembly|
|US5775779 *||27 Mar 1997||7 Jul 1998||General Motors Corporation||Polyurethane thermoplastic elastomer membrane for seat suspension|
|US5833319 *||7 Mar 1997||10 Nov 1998||Davis; Samuel C.||Back cushion and seat cushion system|
|US5904407 *||28 Oct 1997||18 May 1999||Aircraft Modular Products, Inc.||Aircraft seat pan assembly|
|US6027171 *||20 Feb 1998||22 Feb 2000||Lear Corporation||Automotive modular seat frame assembly|
|US6132004 *||13 Nov 1998||17 Oct 2000||Carlino; Lawrence||Back support pillow system|
|US6186594 *||7 Apr 1998||13 Feb 2001||Corporation De L'ecole Polytechnique||Flexible contour wheelchair backrest|
|US6332651 *||27 Aug 1999||25 Dec 2001||Ikeda Bussan Co., Ltd.||Seat for vehicle|
|US6375269 *||25 Nov 1998||23 Apr 2002||Ts Tech Co., Ltd.||Seat having seating face made of sheet resilient material|
|US6435618 *||18 May 2000||20 Aug 2002||Delta Tooling Co., Ltd.||Seat|
|US6457773||31 Aug 2001||1 Oct 2002||Richard L. Gates||Transportable cushioning device|
|US6485103 *||21 Jul 2000||26 Nov 2002||Delta Tooling Co., Ltd.||Structural unit having net member incorporated therein, seat and method for treating end section of net member|
|US6550858||21 Sep 2000||22 Apr 2003||Lear Corporation||Extricable seat assembly|
|US6629729 *||4 Jan 2002||7 Oct 2003||Honda Giken Kogyo Kabushiki Kaisha||Rear seat for a vehicle|
|US6644752 *||13 Jul 2001||11 Nov 2003||Delta Tooling Co., Ltd.||Folding seat having a belt member|
|US6733074 *||28 Jun 2002||11 May 2004||Marken International, Inc.||Support assembly for use with a wheelchair|
|US6733084||5 Feb 2003||11 May 2004||Moeller Marine Products||Boat comfort seat assembly|
|US6786544 *||7 Nov 2003||7 Sep 2004||Tachi-S Co., Ltd.||Seat back structure of vehicle seat|
|US6808230 *||21 May 2001||26 Oct 2004||Daimlerchrysler Ag||Seat module for a vehicle seat which can be actively ventilated and method of making same|
|US6811218||10 Dec 2002||2 Nov 2004||Kimball International, Inc.||Chair with conforming seat|
|US7025423 *||17 Jul 2003||11 Apr 2006||Delta Tooling Co., Ltd.||Seat structure|
|US7252341 *||11 Oct 2006||7 Aug 2007||Recaro Gmbh & Co. Kg||Vehicle seat, in particular a motor vehicle seat|
|US7255404 *||24 Mar 2003||14 Aug 2007||Intier Automotive Inc.||Seat frame panel for attaching a fabric suspension|
|US7270377 *||25 Jun 2002||18 Sep 2007||Schmitz Jack D||Lumbar support for law enforcement officers|
|US7290837 *||27 Oct 2005||6 Nov 2007||Ts Tech Co., Ltd.||Cushion plate for vehicle seat|
|US7537286 *||27 Jun 2005||26 May 2009||Walker Brock M||Seat with adjustable support system|
|US7600821 *||3 Jul 2002||13 Oct 2009||Delta Tooling Co., Ltd.||Seat|
|US7654617 *||6 Jun 2008||2 Feb 2010||Mity-Lite, Inc.||Flexible chair seat|
|US7878591 *||27 Jul 2004||1 Feb 2011||Herman Miller Inc.||Sacral support member for seating|
|US7971939 *||1 Apr 2005||5 Jul 2011||Delta Tooling Co., Ltd.||Seat structure|
|US8029059||13 Apr 2009||4 Oct 2011||Mity-Lite, Inc.||Folding and stacking mesh chair system|
|US8033598||13 Apr 2009||11 Oct 2011||Mity-Lite, Inc.||Mesh folding chair|
|US8033612||13 Apr 2009||11 Oct 2011||Mity-Lite, Inc.||Comfortable mesh folding chair|
|US8038221||13 Apr 2009||18 Oct 2011||Mity-Lite, Inc.||Folding mesh chair with nesting hoops|
|US8061775||20 Jun 2006||22 Nov 2011||Humanscale Corporation||Seating apparatus with reclining movement|
|US8136884 *||4 Feb 2010||20 Mar 2012||L & P Property Management Company||Textile-attached deck assembly|
|US8240771 *||13 May 2005||14 Aug 2012||Humanscale Corporation||Mesh chair component|
|US8317269||4 Nov 2009||27 Nov 2012||Mity-Lite, Inc.||Mesh stacking chair|
|US8322787||4 Nov 2009||4 Dec 2012||Mity-Lite, Inc.||Clamping joint for a chair|
|US8398170||5 Oct 2007||19 Mar 2013||Brock Walker||Active response seating system|
|US8454093||29 Mar 2010||4 Jun 2013||Mity-Lite, Inc.||Mesh chair with open-end hoop|
|US8517469||6 Sep 2012||27 Aug 2013||Aspen Seating, Llc||Three-axis adjustable back support assembly and method|
|US8567863||2 Mar 2011||29 Oct 2013||Aspen Seating, Llc||Back support, orientation mechanism and method|
|US8777312||23 Feb 2012||15 Jul 2014||Humanscale Corporation||Seating apparatus with reclining movement|
|US8794708 *||17 Jul 2009||5 Aug 2014||Faurecia Sieges d'Autmobile||Motor vehicle seat upholstery formation|
|US9004604||1 Feb 2012||14 Apr 2015||L&P Property Management Company||Installation of a textile deck assembly in an article of furniture|
|US9049937||15 Feb 2013||9 Jun 2015||Brock Walker||Active response seating system|
|US9073469 *||15 Nov 2013||7 Jul 2015||Toyota Boshoku Kabushiki Kaisha||Vehicle seat|
|US9095228 *||9 Dec 2009||4 Aug 2015||Bombol Limited||Containing structure for small children fitted with a dynamic backrest|
|US9266450 *||10 Nov 2011||23 Feb 2016||Vital Seating & Systems Limited||Seat for absorbing a force|
|US9393891 *||19 Feb 2015||19 Jul 2016||Grammer Ag||Vehicle seat with form-adjustable side wings|
|US9409332 *||7 Sep 2010||9 Aug 2016||Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg||Method for producing support structures in motor vehicles|
|US9492014||26 Sep 2011||15 Nov 2016||Mity-Lite, Inc.||Mesh folding chair|
|US9504326||10 Apr 2013||29 Nov 2016||Humanscale Corporation||Reclining chair|
|US20040000804 *||28 Jun 2002||1 Jan 2004||Groth Michael C.||Support assembly for use with a wheelchair|
|US20040256903 *||17 Jul 2003||23 Dec 2004||Etsunori Fujita||Seat structure|
|US20050052061 *||8 Jul 2004||10 Mar 2005||Deimen Michael L.||Chair with lumbar support and conforming back|
|US20050104428 *||27 Jul 2004||19 May 2005||Walker Brock M.||Sacral support member for seating|
|US20050179306 *||4 Jan 2005||18 Aug 2005||Johnson Controls Technology Company||Cushion and trim cover for contoured cushion presenting seat|
|US20050236884 *||24 Mar 2003||27 Oct 2005||Neale Colin G||Seat frame panel for attaching a fabric suspension|
|US20050264087 *||13 May 2005||1 Dec 2005||Humanscale Corporation||Mesh chair component|
|US20060001304 *||27 Jun 2005||5 Jan 2006||Brock M. Walker||Seat with adjustable support system|
|US20060232114 *||27 Oct 2005||19 Oct 2006||Ts Tech Co. Ltd.||Cushion plate for vehicle seat|
|US20070001497 *||20 Jun 2006||4 Jan 2007||Humanscale Corporation||Seating apparatus with reclining movement|
|US20070040440 *||11 Oct 2006||22 Feb 2007||Recaro Gmbh & Co. Kg||Vehicle seat, in particular a motor vehicle seat|
|US20070236071 *||1 Apr 2005||11 Oct 2007||Delta Tooling Co., Ltd||Seat Structure|
|US20080001452 *||18 Sep 2007||3 Jan 2008||Schmitz Jack D||Lumbar Support for Law Enforcement Officers|
|US20090152930 *||23 Feb 2009||18 Jun 2009||Humanscale Corporation||Seating Apparatus With Reclining Movement|
|US20100194172 *||4 Feb 2010||5 Aug 2010||L & P Property Management Company||Textile-attached deck assembly|
|US20110187176 *||17 Jul 2009||4 Aug 2011||Faurecia Sieges D'automobile||Motor vehicle seat upholstery formation|
|US20120061514 *||26 Mar 2010||15 Mar 2012||Recaro Aircraft Seating Gmbh & Co., Kg||Passenger seat device comprising a covering unit|
|US20120181830 *||9 Dec 2009||19 Jul 2012||Bombol Limited||Containing structure for small children fitted with a dynamic backrest|
|US20120241999 *||7 Sep 2010||27 Sep 2012||Kroener Gregor||Method for producing support structures in motor vehicles|
|US20130229038 *||10 Nov 2011||5 Sep 2013||Vital Seating & Systems Limited||Seat for absorbing a force|
|US20140139003 *||15 Nov 2013||22 May 2014||Nhk Spring Co., Ltd.||Vehicle seat|
|US20150231998 *||19 Feb 2015||20 Aug 2015||Grammer Ag||Vehicle seat with form-adjustable side wings|
|USD648554||4 Nov 2009||15 Nov 2011||Mity-Lite, Inc.||Mesh stacking chair|
|USD660612||16 Nov 2010||29 May 2012||Mity-Lite, Inc.||Mesh banquet chair|
|USD673401||12 Jun 2012||1 Jan 2013||Humanscale Corporation||Chair support structure|
|CN1942123B||1 Apr 2005||20 Jun 2012||株式会社三角工具加工||Armchair structure|
|DE4008936A1 *||20 Mar 1990||4 Oct 1990||Aisin Seiki||Sitzlehnen-federungsvorrichtung|
|DE4008936B4 *||20 Mar 1990||1 Jul 2004||Aisin Seiki K.K., Kariya||Sitzlehnen-Federungsvorrichtung|
|DE4215521A1 *||12 May 1992||19 Nov 1992||Toyota Motor Co Ltd||Car seat comfortable design for rapid prodn. - has elastic system of porous polypropylene@ or polyester threads between locking strips on sides for initial softness and polyurethane foam cushioning|
|DE4215521C2 *||12 May 1992||9 Jul 1998||Toyota Motor Co Ltd||Fahrzeugsitz und Verfahren zu dessen Herstellung|
|DE4232364A1 *||26 Sep 1992||31 Mar 1994||Porsche Ag||Shell seat for passenger car - uses spring mat attached by straps to give greater comfort.|
|DE4232364C2 *||26 Sep 1992||4 Jun 1998||Porsche Ag||Schalensitz für Fahrzeuge, insbesondere für Personenkraftwagen|
|DE102005024090B4 *||25 May 2005||2 Jul 2015||Honda Motor Co., Ltd.||Fahrzeugsitz|
|DE102009040884A1 *||9 Sep 2009||10 Mar 2011||GM Global Technology Operations, Inc., Detroit||Backrest for seat arrangement of motor vehicle seat, has planar formation fastened to retaining units such that formation extends under formation of backrest surface section of backrest surface between units over supporting structure|
|DE102014112339A1 *||28 Aug 2014||3 Mar 2016||Bayerische Motoren Werke Aktiengesellschaft||Thoraxstütze eines Sitzes|
|EP1170170A1 *||23 Feb 2001||9 Jan 2002||Textrim S.r.l.||An upholstery item for a motor vehicle|
|U.S. Classification||297/452.56, 297/284.1, 297/452.49, 297/452.23, 297/452.3, 297/452.34|
|International Classification||A47C7/46, A47C7/02, B60N2/70|
|Cooperative Classification||A47C7/282, B60N2/7094|
|European Classification||A47C7/28A, B60N2/70Y|
|13 Jul 1988||AS||Assignment|
Owner name: IKEDA BUSSAN CO., LTD., 771, KOZONO, AYASE-SHI, KA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:IZUMIDA, SATOSHI;KITAMURA, KATSUMI;REEL/FRAME:004907/0277
Effective date: 19880708
Owner name: IKEDA BUSSAN CO., LTD.,JAPAN
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:IZUMIDA, SATOSHI;KITAMURA, KATSUMI;REEL/FRAME:004907/0277
Effective date: 19880708
|14 May 1993||FPAY||Fee payment|
Year of fee payment: 4
|7 May 1997||FPAY||Fee payment|
Year of fee payment: 8
|19 Jun 2001||REMI||Maintenance fee reminder mailed|
|28 Nov 2001||LAPS||Lapse for failure to pay maintenance fees|
|29 Jan 2002||FP||Expired due to failure to pay maintenance fee|
Effective date: 20011128